Gas Mass Sensor/Mixture Control Valve (2.2L - Cavalier - CNG)

WARNING: Before servicing any electrical component, ignition must be in Off or Lock position and all electrical loads must be off, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

Disconnect negative battery cable. Disconnect GMS/MCV electrical connectors. See Figure. Remove throttle cables from retaining clip. Loosen vapor hose clamp at outlet of GMS/MCV. Remove 4 screws from GMS/MCV inlet elbow. Remove GMS/MCV bracket attaching nuts from isolators and remove GMS/MCV and bracket from module bracket. Remove GMS/MCV from bracket.
Install GMS/MCV to bracket. Tighten GMS/MCV-to-bracket nuts to 106 INCH lbs. (12 N.m). Install GMS/MCV and bracket to isolation mounts on module bracket. Tighten GMS/MCV-to-module bracket nuts to 33 INCH lbs. (3.7 N.m). Install GMS/MCV inlet elbow using NEW "O" ring. Tighten screws to 48 INCH lbs. (5.4 N.m). Tighten fuel clamp to 18 INCH lbs. (2 N.m). To complete installation, reverse removal procedure.